These are part for part identical to St*hl MS660 066 saws for a fraction of the price. I put anywhere from 1-3 hours into each and every saw, to make sure it is assembled correctly, before I will sell it. Then I test run each saw to make sure everything is working correctly. It will run, cut, idle, oil, and the chain brake will work properly. Come run the saw before you buy it. I have plenty of parts on hand to work on them, so you will have good customer support behind them. Bars and chains are available also. I have sold a good many of these saws and they are holding up great. My customers are impressed with how good they run. I can ship as well.